US8003148B2 - Device and method for frothing and steaming milk - Google Patents

Device and method for frothing and steaming milk Download PDF

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Publication number
US8003148B2
US8003148B2 US12/191,351 US19135108A US8003148B2 US 8003148 B2 US8003148 B2 US 8003148B2 US 19135108 A US19135108 A US 19135108A US 8003148 B2 US8003148 B2 US 8003148B2
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Prior art keywords
milk
set forth
steamer
temperature
air feeder
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Expired - Fee Related, expires
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US12/191,351
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English (en)
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US20090047402A1 (en
Inventor
Claudio Schödler
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Cafina AG
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Cafina AG
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Assigned to CAFINA AG reassignment CAFINA AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHODLER, CLAUDIO
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/4489—Steam nozzles, e.g. for introducing into a milk container to heat and foam milk
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J11/00—Apparatus for treating milk
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/40—Beverage-making apparatus with dispensing means for adding a measured quantity of ingredients, e.g. coffee, water, sugar, cocoa, milk, tea

Definitions

  • the invention relates to a device for frothing and steaming milk as well as to methods for frothing and steaming milk.
  • Such devices find application especially or together with espresso coffee machines.
  • the milk froth created by the device is used for example in producing a cappuccino or latte whilst the steamed milk may be used both in preparing milk coffee as well as hot milk beverages.
  • Known devices usually feature a pivotably mounted steamer tube ending in a nozzle for jetting the steam. Jetting is started and stopped by means of a rotary switch or the like.
  • the steamer tube is usually inerted relatively deeply into the receptacle containing the milk and the steam feed initiated. The steaming action is terminated as judged by the operator, the barista.
  • the steamer tube is inserted into the milk just enough so that the jet of steam can entrain ambient air which ultimately is responsible for the frothing.
  • how good the resulting milk froth is, depends on the expertise of the barista. When creating milk froth too, frothing is terminated as judged by the barista.
  • emulsifier units In addition to these simple devices fully automatic emulsifier units are known in which a steam feed conduit connected to the steamer ports into a suction chamber. This suction chamber is connected to a milk feed conduit and an air feed conduit. The flow of steam creates a negative pressure in the suction chamber causing the milk to be drawn into the suction chamber via the milk feed conduit and air via the air feed conduit. This steam/air/milk mixture is transformed into a turbulent flow in a subsequent emulsifier chamber, resulting in a hot emulsion of milk and air.
  • One such emulsifier unit is known for example from EP-A-0 195 750.
  • German patent DE 602 15 058 T2 is a device for steaming and frothing milk.
  • the device comprises a calorifier connected via a first pipe—the steam pipe—to a delivery pipe.
  • a shutoff valve Inerted in addition in the steam pipe is a shutoff valve.
  • the delivery pipe has an open end for immersing in a receptacle containing milk.
  • the device comprises furthermore an electrically powered pump for feeding the air pressurized.
  • the pump is connected via a second pipe to the delivery pipe.
  • a temperature sensor is provided connected to the immersible end of the delivery pipe to serve sensing the temperature of the milk.
  • the steam pipe is additionally provided with a bypass pipe to bypass the shutoff valve.
  • One object of the invention is to configure a device for frothing and steaming milk, such that a good quality of the created finished product, particularly of the created milk froth, is assured whilst also making it possible to heat the milk without it being frothed, the device excelling by being simply structured, easy to operate and cost-effective to manufacture.
  • the invention is provided with a steamer, a steam conduit connecting the steamer to a steamer tube for insertion into the milk, a temperature sensor arranged on the steamer tube for sensing the milk temperature and a controller connected to the temperature sensor, characterized in that included in the steam conduit is a venture nozzle provided with an air feeder port selectively closeable by means of the controller.
  • the device comprises an externally activated closure means for closing off the air feeder port the controller actuating the closer means as a function of the mode operation and/or the sensed milk temperature.
  • the closure means may be electromagnetically actuatable.
  • the controller controls the closure means such that the air feeder port is closed when steamed milk is created. In other embodiments, the controller activates the closure means such that the air feeder port is closed off when initially frothing the milk to then open the air feeder port once a predefined milk temperature is attained.
  • the closure means may include a spring-loaded closure element for closing off the air feeder port, the closure element being devised to close off the air feeder port in the active operating position whilst releasing the air feeder port by spring force in the non-active operating position.
  • the temperature sensor may be arranged in the region of the tip of the steamer tube.
  • the temperature sensor may protrude beyond the steamer tube axially.
  • the steamer tube may be provided with a nozzle member at one end from which steam can be jetted at an angle to the longitudinal centerline of the steamer tube.
  • the longitudinal centerline of the temperature sensor may be arranged coaxial to the longitudinal centerline of the steamer tube.
  • the nozzle member may further be configured to mount the temperature sensor.
  • the device may include arranged in the steam conduit upstream of the venturi nozzle an electromechanically actuatable valve ( 4 ) which is connected to the controller, the valve being devised to close off the output of the steamer in the OFF position and to simultaneously connect the steam conduit to the atmosphere.
  • Defined furthermore is a method of frothing milk using the device described above characterized in the with the air feeder port closed the milk is heated by means of steam supplied via the steam conduit to a predefined milk temperature and that on attaining this temperature the air feeder port is opened and frothing continued by means of steam aggregated with air.
  • a preferred further embodiment of the method is characterized in that the temperature of the milk is monitored and frothing halted by stopping the steam supply when a predefined final temperature is attained.
  • the inventor further contemplates a method of steaming milk using the device described above, characterized in that with the closure means closed, the milk is heated by means of steam supplied via the steam conduit to a predefined milk temperature and steaming discontinued when this temperature is attained.
  • a coffee machine is provided with a device configured as described above characterized in that the steamer tube is mounted pivotable and/or height-adjustable on the coffee machine.
  • FIG. 1 is a diagrammatic illustration of the device for frothing and steaming milk
  • FIG. 2 is a cross-section through the front end of the steamer tube shown magnified.
  • FIG. 1 there is illustrated diagrammatically a device for frothing and steaming milk for detaining the basic configuration of the device.
  • the device comprises a steamer 1 connected via a steam conduit 2 to a steamer tube 3 .
  • an electromagnetically actuatable valve 4 arranged in the steam conduit 2 is an electromagnetically actuatable valve 4 followed downstream by a venturi nozzle 5 provided with an air feeder port 6 is can be closing off selectively, i.e as a function of the wanted operating mode.
  • the air feeder port 6 can be closed off by means of an electromagnetically actuator 8 , a closure element 9 being provided as the actual closing off part which is displaceable to open and close the air feeder port 6 .
  • the closure element 9 of the actuator 8 is biased by means of a spring (not shown) so that in the non-active operating condition it is located in its retracted resting position whilst when the actuator 8 is activated the closure element 9 is in its extended active position in which the air feeder port 6 is closed off. In the present example the closure element 9 is in its retracted resting position in which it opens up the air feeder port 6 .
  • the venturi nozzle 5 is provided with an adjustable restrictor 7 by means of which the size of the air feeder port 6 can be adjusted.
  • This restrictor 7 By means of this restrictor 7 the amount of air induced per unit of time and thus especially the consistency of the generated milk froth can be varied.
  • the restrictor 7 can be set, for example, manually or electromechanically.
  • the steam conduit 2 ports radially into the rear end of the steamer tube 3 .
  • the steamer tube 3 is provided with a temperature sensor 11 which protrudes beyond the steamer tube 3 axially.
  • the tip of the steamer tube 3 forms a nozzle member 12 featuring a plurality of jetting orifices as detained further below with reference to FIG. 2 .
  • the device features furthermore an electronic controller 13 electrically connected to the valve 4 , to the actuator 8 as well as to the temperature sensor 11 .
  • the restrictor 7 is electromagnetically actuatable it may also be connected to the controller 13 .
  • two buttons 14 , 15 are provided which are likewise electrically connected to the controller 13 .
  • Designated B in conclusion is a receptacle serving to accommodate the milk to be steamed/frothed. In the OFF position as shown the valve 4 is in its vent position in which the steam conduit 2 is connected to the atmosphere. In this vent position the valve 4 simultaneously closes also the steam outlet of the steamer 1 .
  • the function of the device is as follows:
  • the tip of the steamer tube 3 is immersed in the milk (not shown) held in the receptacle B.
  • the steamer tube 3 is to be immersed in the milk sufficiently so that the steam outlet or orifices is/are immersed in the milk by a few centimeters so that the steam jetted by the nozzle cannot entrain ambient air.
  • Pressing the button 14 then starts the steaming action by the controller 13 opening the valve 4 so that steam flows from the steamer 1 via the open valve 4 and the steam conduit 2 into the steamer tube 3 to be jetted from the end nozzle thereof.
  • the air feeder port 6 of the venturi nozzle 5 is closed off by the closure element 9 so that no air can be drawn in by the steam stream.
  • the steam jetted by the steam outlet orifices heats the milk, the temperature of which is continuously sensed by means of the temperature sensor 11 .
  • the steam feed is automatically discontinued and the steaming action terminated.
  • the valve 4 is closed by the controller 13 and the steam conduit 2 reopened to the atmosphere.
  • the temperature at which the steaming action is terminated can usually be set by the operator within certain limits, 90° C. being a maximum for the milk temperature.
  • the tip 12 of the steamer tube 3 as well as the axially protruding temperature sensor 11 can be simply wiped clean with a moist cloth.
  • the tip of the steamer tube 3 is immersed in the milk (not shown) held in the receptacle.
  • the steamer tube 3 is again to be immersed in the milk so that the steam outlet or orifices is/are immersed in the milk by a few centimeters so that the steam jetted by the nozzle cannot entrain ambient air.
  • Pressing the button 15 then starts the frothing action by the controller 13 opening the valve 4 so that steam flows from the steamer 1 via the open valve 4 and the steam conduit 2 into the steamer tube 3 to be jetted from orifices machined in the nozzle body 12 .
  • the air feeder port 6 of the venturi nozzle 5 is closed off by the closure element 9 so that no air can be drawn in by the throughflow of steam.
  • the steam jetted from the nozzle body 12 heats the milk, the temperature of which is continuously sensed by means of the temperature sensor 11 .
  • the actuator 8 is activated so that its closure element 9 is unseated from the air feeder port 6 of the venturi nozzle 5 to open up the air feeder port 6 .
  • the milk is just steamed without froth being generated.
  • the air feeder port 6 is opened up the steam flowing through the venturi nozzle 5 draws in air via the air feeder port 6 . Since the way in which venturi nozzles work is well known, no details are needed here.
  • the intake air is mixed in the venturi nozzle 5 with the steam, resulting in a mixture of steam and air being jetted from the nozzle member 12 , generating milk froth.
  • the steam feed is automatically discontinued and the frothing action terminated.
  • the valve 4 is closed by the controller 13 and the steam conduit 2 reopened to the atmosphere.
  • the temperature at which the frothing action is terminated can usually be set by the operator within certain limits, 90° C. being a maximum for the milk temperature.
  • the nozzle member 12 of the steamer tube 3 as well as the axially protruding temperature sensor 11 can be simply wiped clean with a moist cloth.
  • the controller 13 is preferably devised to discontinue the steaming action or frothing action at any time simply by the corresponding buttons 14 , 15 being pressed.
  • each action can also be extended simply by repressing the corresponding button within a predefined time duration, for example 5 secs after termination of the steaming action or frothing action.
  • Repressing the button causes in this case the milk to be steamed by a predefined temperature difference, for example 3° C. above the preprogrammed wanted temperature.
  • the milk is steamed by the cited temperature difference whilst in the frothing action air is also added, where necessary.
  • FIG. 2 there is illustrated a cross-section through the tip of the steamer tube 3 shown magnified.
  • the steamer tube 3 ends in a nozzle member 12 comprising a plurality of jetting orifices 16 via which steam can be jetted at an angle to the longitudinal centerline L of the steamer tube 3 or of the temperature sensor 11 .
  • This jetting angle is selected so that the milk is steamed/frothed homogenously, on the one hand, and that, on the other, the jetted steam does not impact the temperature sensor 11 to avoid it falsifying temperature sensing.
  • the longitudinal centerline of the temperature sensor 11 is oriented coaxial to the longitudinal centerline of the steamer tube 3 .
  • the nozzle member 12 At its rear end the nozzle member 12 is provided with a male thread 18 by means of which it is screwed secure to the steamer tube 3 .
  • the nozzle member 12 At the tip the nozzle member 12 features a central hole serving to locate the temperature sensor 11 .
  • the temperature sensor 11 is secured to the tubular element 17 , the interior of which guides the electrical leads connecting the temperature sensor 11 .
  • the steam is jetted through the annular space 19 between the tubular element 17 and the inner side of the tubular steamer tube 3 , passing the steamer tube 3 to the jetting orifices 16 .
  • the temperature sensor may be, for example, a thermoelement or a thermistor NTC resistor sensor.
  • the device as described is particularly suitable for use with or in an espresso coffee machine on which the steamer tube is mounted preferably pivotable and/or height-adjustable on the coffee machine.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Husbandry (AREA)
  • Environmental Sciences (AREA)
  • Apparatus For Making Beverages (AREA)
  • Commercial Cooking Devices (AREA)
  • Food-Manufacturing Devices (AREA)
US12/191,351 2007-08-16 2008-08-14 Device and method for frothing and steaming milk Expired - Fee Related US8003148B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH12902007 2007-08-16
CH1290/07 2007-08-16
CH01290/07 2007-08-16

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US20090047402A1 US20090047402A1 (en) 2009-02-19
US8003148B2 true US8003148B2 (en) 2011-08-23

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US (1) US8003148B2 (ja)
EP (1) EP2025270B1 (ja)
JP (1) JP5152802B2 (ja)
KR (1) KR20090018001A (ja)
CN (1) CN101380201B (ja)
AU (1) AU2008203858A1 (ja)
CA (1) CA2638853C (ja)

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US9474408B2 (en) 2011-06-17 2016-10-25 Wmf Group Gmbh Apparatus for heating and frothing a beverage product
US9788686B2 (en) 2013-11-28 2017-10-17 Wmf Group Gmbh Electrically operated drink maker, in particular electrically operated coffee machine, with steam lance for frothing up milk
US11058250B2 (en) 2018-09-06 2021-07-13 Starbucks Corporation Apparatus for foaming a beverage
US11083328B2 (en) 2017-06-22 2021-08-10 Starbucks Corporation Apparatus and method for foaming a beverage

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CN104545445A (zh) * 2013-10-12 2015-04-29 通用国际企业有限公司 牛奶蒸汽机
ES2572256T3 (es) * 2014-02-07 2016-05-31 Gruppo Cimbali Spa Un dispositivo para el calentamiento de una cantidad de líquido, en particular leche, en un recipiente
CN104305881B (zh) * 2014-09-15 2017-06-13 宁波美侬咖啡机有限公司 一种嵌入式奶沫器
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US9895667B2 (en) * 2015-05-05 2018-02-20 Fizzics Group Llc Carbonated fluid dispenser with ultrasonic foaming mechanism
WO2017063936A1 (de) * 2015-10-16 2017-04-20 Eversys Holding Sa Vorrichtung und verfahren zum erhitzen und aufschäumen einer flüssigkeit, insbesondere eines getränks
CH714003B1 (de) * 2017-07-20 2022-05-13 Steiner Ag Weggis Verfahren zum manuellen Steuern einer Bedieneinheit für die Abgabe von Dampf aus einer Kaffeemaschine, sowie eine Bedieneinheit.
CN107495457A (zh) * 2017-09-29 2017-12-22 无锡科安自动化装备有限公司 食品加工用搅拌锅
DE102018101025A1 (de) * 2018-01-18 2019-07-18 Franke Kaffeemaschinen Ag Vorrichtung zum aufschäumen von milch
KR101944246B1 (ko) 2018-02-08 2019-01-31 (주)미스터커피 에스프레소 커피머신의 자동 밀크 폼 생성 장치
EP3536201A1 (fr) * 2018-03-09 2019-09-11 Reneka International Dispositif de production de vapeur et d'air sous pression et procédé de commande d'un tel dispositif
ES2782699B2 (es) * 2019-03-12 2022-01-12 Crem Int Spain S L Procedimiento y máquina para emulsionar leche
IT201900009249A1 (it) * 2019-06-17 2020-12-17 Gruppo Cimbali Spa Apparato per la montatura del latte e metodo per la montatura del latte mediante tale apparato
CN110279298B (zh) * 2019-07-31 2021-02-02 宁波卜合电器有限公司 咖啡机和对该咖啡机的奶泡制备系统进行清洗的方法
CN113273899B (zh) * 2020-02-20 2022-08-09 九阳股份有限公司 一种食品加工机及其控制方法

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US20100107891A1 (en) * 2008-11-01 2010-05-06 Dyson Technology Limited Domestic appliance
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EP2025270A3 (de) 2013-09-25
EP2025270A2 (de) 2009-02-18
CA2638853C (en) 2012-01-24
AU2008203858A1 (en) 2009-03-05
KR20090018001A (ko) 2009-02-19
JP5152802B2 (ja) 2013-02-27
CA2638853A1 (en) 2009-02-16
US20090047402A1 (en) 2009-02-19
CN101380201B (zh) 2012-10-10
CN101380201A (zh) 2009-03-11
EP2025270B1 (de) 2017-04-12
JP2009045463A (ja) 2009-03-05

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